DEVICE FOR COOLING AND CALIBRATING PLASTIC PROFILES
(19)AUSTRALIAN PATENT OFFICE (54) Title DEVICE FOR COOLING AND CALIBRATING PLASTIC PROFILED PIECES (51)6 International Patent Classification(s) B29C 047/90 (21) Application No: 2003277935 (22) Application Date: 2003.10.30 (87) WIPONo: WO04/041512 (30) Priority Data (31) Number (32) Date A 1688/2002 2002.11.08 (33) Country AT (43) Publication Date : 2004.06.07 (43) Publication Journal Date : 2004.07.01 (71) Applicant(s) TECHNOPLAST KUNSTSTOFh 1 bCHNIK GMBH (72) Inventor(s) SCHWAIGER, Meinhard (H) Application NoAU2003277935 A1(19)AUSTRALIAN PATENT OFFICE (54) Title DEVICE FOR COOLING AND CALIBRATING PLASTIC PROFILED PIECES (51)6 International Patent Classification(s) B29C 047/90 (21) Application No: 2003277935 (22) Application Date: 2003.10.30 (87) WIPONo: WO04/041512 (30) Priority Data (31) Number (32) Date A 1688/2002 2002.11.08 (33) Country AT (43) Publication Date : 2004.06.07 (43) Publication Journal Date : 2004.07.01 (71) Applicant(s) TECHNOPLAST KUNSTSTOFh 1 bCHNIK GMBH (72) Inventor(s) SCHWAIGER, Meinhard The invention relates to a device for cooling and calibrating plastic profiled pieces, comprising a housing (13) that has an entry opening and an exit opening for the profiled piece (8) to be treated, and comprising a sleeve (12), which is placed inside the housing, connects the entry opening to the exit opening, and which surrounds a passageway (24) that essentially corresponds to the outer contour of the profiled piece (8) while enabling the profiled piece (8) to be guided therein. Said sleeve, in essence, completely surrounds the profiled piece in the area of the device. The inventive device also comprises a vacuum system for generating a vacuum inside the gap between the profiled piece (8) and the sleeve (12) that is connected to openings (14, 15), which have small dimensions and are provided in the sleeve (12). Finally, the device comprises at least one interior space (25), which is filled with a cooling medium when the device is in operation and which is connected to an inflow opening (17) and to an outflow opening (18) for a cooling medium in order to produce a flow of the cooling medium inside the interior space (25). An improved cooling capacity can be achieved by virtue of the fact that the sleeve (12) has at least one thin-walled section, which separates the passageway (24) from the interior space (25), and that openings (14, 15) are provided in this section that connect the passageway (24) to the interior space (25). A device for cooling and calibrating plastic profiles, comprising
- a housing (13) with an entry opening and an exit opening for the profile (8) to be processed, and- a sleeve (12), which is disposed within the housing and encloses a passage (24) essentially corresponding to the outer contour of the profile (8) and enabling the profile (8) to be guided therein, said sleeve (12) completely surrounding the profile inside the device and having at least one thin-walled section separating the passage (24) from the interior space (25), with openings (14, 15) being positioned in this section, which connect the passage (24) and the interior space (25), and- a vacuum system for generating a vacuum in the gap between profile (8) and sleeve (12), which system is connected to openings (14, 15) provided in the sleeve (12), and- at least one interior space (25), which is filled with a cooling medium during operation of the device and is provided with an inflow opening (17) and an outflow opening (18) for the cooling medium such that a flow of the cooling medium can be generated in the interior space (25),characterized in that the sleeve (12) connects the entry opening and the exit opening, and that the housing (13) and the sleeve (12) comprise a plurality of parts and can be disassembled during operation, and that the thin-walled section of the sleeve (12) has a thickness of less than 6%, and preferably less than 3%, of the diameter of the profile (8) to be processed. A device according to claim 1, characterized in that the openings (14, 15) are at least partly configured as bores (15), with a diameter of less than 1.0 mm, and preferably between 0.5 and 0.7 mm. A device according to claim 1 or 2, characterized in that the openings (14, 15) are at least partly configured as slits (14), whose width is less than 1.0 mm, and preferably about 0.7 mm. A device according to any of claims 1 to 3, characterized in that the sleeve (12), in addition to the openings (14, 15), is provided with at least one air feeder opening which communicates with an air chamber. A device according to claim 4, characterized in that the air feeder opening communicates with the air chamber via an air feeder line, in which is disposed a control valve. A device according to any of claims 1 to 5, characterized in that flow guiding elements are provided in the interior space (25). A device according to any of claims 1 to 6, characterized in that the housing (13) and the sleeve (12) comprise a plurality of parts and can be disassembled during operation. A device according to any of claims 1 to 7, characterized in that a plurality of housings (13) are positioned on a common ground plate one behind the other and aligned in longitudinal direction. A device according to any of claims 1 to 8, characterized in that the outflow opening (18) is connected to a self-priming water pump in order to create the low pressure in the interior space. A device according to any of claims 1 to 9, characterized in that the openings (14, 15) are located primarily in areas corresponding to the visible areas of the profile (8). A device according to any of claims 1 to 10, characterized in that the openings are configured at least partly as slits (14a) on the interior wall of the sleeve (12), which communicate with the outside of the sleeve (12) via bores (15a).